Furnace.



i. POMEROY.

FURNACE. AvPLlcATmN miv uw 12. 1912.

151373426, mente@ Apr. 27, 1915.

r 2 SHEETS-SHEET 2.

@Eurem- 4 ou?, filo mici impro-'wi in commotion- 1 misto @i me @voi avisas @Li mi@ ne? dessmbea with a, im?

enoe, inacaocf'anoe Wifnh my pfese nvenozi, employ an. amiary Steam gonemtol congestion Wlth the flrnacoo boiler 1211's boxa to suppy he seam under askan ad'ional impofant feature, so ab moge ibis auary heaos? so m. any snrpns Stream 5o-W? sfom not required to aoiao o? Roma-sa fiile combustion, and

mslgeci in connecon with ibo mile? aad box of an oldiary sfeam heatag pagxg; Fie?. is a dot View n eemtion, ooag at one om; of ish@ bdge of tho 51'@ box; Fig. 3 ifs a seoaon @kan appromatoy on this .ne .Q23 :v3 on Fig, l some being brokom away; Fig. 4 is a deta View inv eievaon showing @he so-calod nozzle pipe, and moms ifo? adgusog the same, 'some parts oo mvonion im its preferred somo @ms og broken away; @n ige.

sages. l The e resi', upon 2115i aro ierlocke wh averi-Mol foar Wa 9 of the base?.

f'he auxlhaz-y seam' genomomas Shown,

comprises a reatvely sma' upiigfnt boiler l0, oonvonenlj; supportedbybaoks lion one side of ine buck Work n fire box, preferably, otono side thereof; and

extencng above the gratas, 'is a steam generating manfod made up ofvertca Water' tnbs l2, a horizontal" lower tubo 13 and an incned or oblique upper tube 18a. 011e end of he lower ube lS-s connected by a pipe 14 to the owor poron o the auxiliary boor l@ :m h@ uppe end of the. obli 11e tube 33a is connecec by'a'pige L5 to the 1n- Within. ths' lzo pipe 13. The said manifold constitutes ionen of a large number of different steam generators that may be employed.v It is evident that steam enereted-in the manifold will ass' upwar the oblique pipel" and rom thence..,through the pi 15 Ainto the,l

auxilia boiler 1.0: By the o lique arrange meut o the said tube 13,' steam ockets 15 within the generatorare avoided. e relatively cold water from the boiler 10 is delivered through the pipe 14 into the generating manifold, so that a continuous circular tion ofthe water in the boiler 10 is maintained.,

Beferably, the water is supplied to the boiler 10 through an automatic valve which maintains the constant desired level.v As. shown, the Water is supplied from a pipe 17 which connects to the casing 18 oan automatic float controlled water inlet valve ofl suitable construction. As shown, the said valve is provided within, witha float 19 connected to an intermediately pivoted lever 20, the free end of which carries a valve 21 that closes the upper end of the pipe 17 whenever, and o y when, the float 19 is raised b water accumulated in the-boiler 10 at the altitude indicated by the broken line marked y on Fig..1. The valve casing 18 is counected to the upper and lower portions of the boiler 10, respectively, by plpes 22 and 23. The'water will low from the casingv 18 into theboiler 10 through the lower pipe 23, but the upper pipe 22 gives an equalization of pressures within the said valve casing. The pipes 17 and 23 are shown as connected by a branch 24 having a normally closed valve, the only purpose of which is to provide means whereby, in testing out the pipes and joints of the apparatus water may be forced entirely through the connections thereof, .by opening the valve of the said connection 2A.

Located within the air bridge formed by the bars 6 and. co erating wall 9 is a socalled nozzle pipe or delivering the steam into the burning products of combustion from the fuel within the fire box or furnace. This nozzle pipe 25 is shown as' supported `by armsv 26 of a rock shaft 27 journaled in suitable bearings 28 secured in the base 7. Preferably, means is rovided for oscillating the shaft 27 and ence, for locking the nozzle pi e 25, fromthe exterior of the furnace, an as shown, the shaft 27 is provided with a bevel gear meshes with the bevel gear 30 on the upper end of a shaft .31, journaled in suitable bear- 65 ings on' the base 7 and provided at its lower 2 9 (see Fig. 4), that marsan of which 'is extended horizontally into the fire box below and at the rear of the gratos, and from thence is extended u ward and connected to the down-turned en 25of the nozzle 'pipe 25 by a swivel joint connection -37, preferably' of the ball and socket type,

the axis of which is located for aliuement with the axis of the rock shaft 27. lit its other end, vthe nozzle pipe 25 is normallymk closed. In its upper portion, the nozzle pipe 25 is provided with a multiplicity of'very small perforations 38, through Which'tlie` A steam will' be' discharged into the roducts 85 of combustion or burnin ases om the fuel which is burning within the fire box. These steam discharge passages 38 .should not be over y of an inch in diameter.

Di'erent furnaces or fire boxes have 90 grates'oiE different types, and the bearing blocks 4 which are interchan eably usable with the bridgebars 6, shoul'have u per faces of diderent contour to fit theen of the grate bars. ln the construction best illustrated in Fig. 2,l the upper faces of the bearing blocks l are beveled but straight. ln the r :instruction illustrated in Fig. 6, the upper A:es of the bearing blocks e are horizontal and dat, but in the construction 190 shown in Fig. 7 the upper faces of the bear-v ing blocks 4 have V-shaped notches that receive V-shaped lugs 3a of the grate bars 3.

A secondary steam delivery pipe 362 extends from the main or primary steam delivery. pipe'36 into the upper portion of the main boiler 2. The numeral 39 indicates a gravity closed blow-ofi' or safety valve, which', as shown, is located at the junction of the pipes 36 and 36B. The numeral 40 'no los 'indicates .a yieldingly closed valve Athat normally closes the pipe 36a.. .The lvalve 39,

when open, permits a blowing od of steam,

but the valve 40, when open, simply opens v f Y.

upthe pipe 36, so that steam may flow 115 from the auxiliary boiler i0 into'the ureinv boiler 2. The'valve 40 should be set toppen under considerably less pressure Vthan thaty y required vto open the valvet. For instance,

if the valve 40 is arranged to openthe 1250 36a when the pressure exceeds thirty po then the safety -valve 39 mi ht be arranged tov open under forty poun s pressure.

valve 41 is inter osed in the steam pipe 86 so that the-sai pipe may be opened or closed, at will.

Operation: The operation summarized, is

substantially as follows: A low pressureof two or three pounds, for instance, will be no maintained in the main boiler 2 and wg a vertical .up the valve 40 assume that a pressure of approximately thirty pounds is maintained in the auxiliary boiler l0. When the valve 4l is opened, steam, under ordinary high pressure will be delivered into the burning products of comdicated at the right by dotted lines in Fig.

2;; for very light draft in the furnace the said nozzle pipe should be adjusted approximately into the position indicated at the left by dotted lines on Fig. 2; and for a medium draft, said nozzle pipe should be turned into osition indicated by full lines in Fig. 2. he reason for these adjustments seems to be that the products of combustion,

.- wlieninoving rapidly, should have the steam spraysA commingled therewith at a point farther back in the furnace than when moving at lower velocity: The adjustment of the nozzle pipe aii'ords efficient means for setting the nozzle pipe in any particular furnace or fire box,

or for thereafter adjusting to meet varying conditions in the draft.

Whenever there is an accumulation of steam in the auxiliary boiler 10, greater than that, required Vto supply the discharge through the perforations 38, an increased pressure will be and permit the steam to be discharged into the main boiler 2. Thus it will be seen that addition to supplying stated, operates as an erator working in conji boiler. From this, in moderate weather, ried in the fire box steam for the purpose auxiliary steam gen- 'ction with the main a very low fire is caror furnace, the entire nected to said steam justing the same,

produced which will open this auxiliary boiler, in'

it follows that when, i

steam generation may be supplied from the auxiliary generator and boiler.

The result of the introduction of the steam into the products of combustion in the form of fine sprays under pressurevis fully disclosed in my said companion application, referred to above. Preferably it causes complete combustion of the gases and smoke, and thereby the elimination of smoke.

What I claim is:

l. In a furnace, a steam supply pipe, a perforated nozzle pipe delivering steam to the furnace and having an offset end connected to said steam supply pipe by a swivel joint, and a rock shaft axially alined with said swivel joint and having-arms connected to the said nozzle pipe for supporting and adjusting the sam v 2. In a furnace, a steam supply pipe, a perforated nozzle pipe delivering steam to the furnace and having an offset end consupply pipe b y a swivel joint, a rock shaft axially alined with said swivel joint and having arms connected to the said nozzle pipe for supporting and adand operating connections to said rock shaft for oscillating t e same, said connections extending to the terior of the furnace.

\3. Ina furnace, a steam supply pipe, a, perforated nozzle pipe delivering steam to the furnace and having an 'offset end connected tosaid steam supply pipe by a swivel joint, a rock shaft axially alined with said swivel joint and having arms connected to the said nozzle pipe for supporting and adjusting thesame, operating connections to said rock shaft for oscillating the same, said connections extending to the exterior of the furnace, and an air bridge inclosing said nozzle pipe.

In testimony whereof I affix my signature in presence of two witnesses.

. JOHN POMEROY. Witnesses HARRY D. KILGORE, F. D. MERCHANT. 

